formbook | 0d65bd3f562fa127be5f009203fed5b0da090648f61d10d03ded5c89228e3766

Analysis

max time kernel
192s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
08-12-2022 17:17

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General

Target

Purchase order 781830171.exe
Size

602KB
MD5

94a7ae060dd2244f3e523ef87ac573d5
SHA1

6da1cf7a0e4a708e6c986a810cbe87ac73bbf5e1
SHA256

0d65bd3f562fa127be5f009203fed5b0da090648f61d10d03ded5c89228e3766
SHA512

b079719fc7064d9137b53e078e331a19cf0805fec42a68e2c625af3eea95f0cd6aca84bbf75c46892fe03d35d0b186bd118a3821b77a748eadb663e1e2232f5b
SSDEEP

12288:zsBbFXMFRCMxYTri4ZzEouFxSdBTM09Zq8SblZuuNwApnkGngLr8z6:4jXMbhmT24yoW07q88lZuEnrngLrr

Score

10^/10

formbook yurm persistence rat spyware stealer trojan

Malware Config

Extracted

Family

formbook

Campaign

yurm

Decoy

X06d1tis1GUX/R0g87Ud

BKiZ33D1P766GVXO1ZwV

lAFdjB7CSxGX8Trz

Gc7dWizTVxWX8Trz

tDkr9JAfi1OHAW1PGOageIp4

bCpMtHKU3mVp8BY5sQ==

7WKpsMWt8nsrhJClJeOZNg==

0A9KTlETQ86Cmd8k0o5NP5RwCg==

aJ61paNJztSp42c=

CrgoA8ySIOsytCbO1ZwV

i46SnHYDD9tTIHI=

XFRCRCjtFZeU3x4Rn3xfD5BnPz+RDA==

c4CZghuHvzW9A31gEz0d

QAjzz9qyRRWBNYseAI4M

Jpbmu4A1YvBvN3ruZgiRmJA5BCFd

PfoFXGNFhhuX8Trz

bqCfk0m8ApAl+Tm1Ms5Tb23IT7tS

z7INff7HNALxc5HWq2/ftrVR6A7R1zvTUQ==

m7IShV4LSFxbqxhrVsZ1Ig==

BHRp7q0gtoRuqBRnVsZ1Ig==

Signatures

Formbook
Formbook is a data stealing malware which is capable of stealing data.
trojan spyware stealer formbook

Executes dropped EXE 2 IoCs

pid	Process
4440	wlljbvbd.exe
4280	wlljbvbd.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	wlljbvbd.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lpwvhpjmpint = "C:\\Users\\Admin\\AppData\\Roaming\\rmtdioxgullb\\jupjwwutq.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\wlljbvbd.exe\" \"C:\\Users\\Admin\\AppData"	wlljbvbd.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4440 set thread context of 4280	4440	wlljbvbd.exe	84
PID 4280 set thread context of 512	4280	wlljbvbd.exe	30
PID 3352 set thread context of 512	3352	colorcpl.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Internet Explorer\IntelliForms\Storage2	colorcpl.exe

Suspicious behavior: EnumeratesProcesses 58 IoCs

pid	Process
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
512	Explorer.EXE

Suspicious behavior: MapViewOfSection 9 IoCs

pid	Process
4440	wlljbvbd.exe
4440	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
4280	wlljbvbd.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe
3352	colorcpl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	wlljbvbd.exe
Token: SeDebugPrivilege	3352	colorcpl.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4440	wlljbvbd.exe
4440	wlljbvbd.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4440	wlljbvbd.exe
4440	wlljbvbd.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 968 wrote to memory of 4440	968	Purchase order 781830171.exe	83
PID 968 wrote to memory of 4440	968	Purchase order 781830171.exe	83
PID 968 wrote to memory of 4440	968	Purchase order 781830171.exe	83
PID 4440 wrote to memory of 4280	4440	wlljbvbd.exe	84
PID 4440 wrote to memory of 4280	4440	wlljbvbd.exe	84
PID 4440 wrote to memory of 4280	4440	wlljbvbd.exe	84
PID 4440 wrote to memory of 4280	4440	wlljbvbd.exe	84
PID 512 wrote to memory of 3352	512	Explorer.EXE	85
PID 512 wrote to memory of 3352	512	Explorer.EXE	85
PID 512 wrote to memory of 3352	512	Explorer.EXE	85
PID 3352 wrote to memory of 4692	3352	colorcpl.exe	86
PID 3352 wrote to memory of 4692	3352	colorcpl.exe	86
PID 3352 wrote to memory of 4692	3352	colorcpl.exe	86

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:512
- C:\Users\Admin\AppData\Local\Temp\Purchase order 781830171.exe
  "C:\Users\Admin\AppData\Local\Temp\Purchase order 781830171.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe
    "C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe" "C:\Users\Admin\AppData\Local\Temp\vikaf.au3"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:4440
  - - C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe
      "C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe"
      4⤵
      Executes dropped EXE
      Checks computer location settings
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of AdjustPrivilegeToken
      PID:4280
- C:\Windows\SysWOW64\colorcpl.exe
  "C:\Windows\SysWOW64\colorcpl.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Modifies Internet Explorer settings
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3352
- - C:\Program Files\Mozilla Firefox\Firefox.exe
    "C:\Program Files\Mozilla Firefox\Firefox.exe"
    3⤵
    PID:4692

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\bzsjwac.vy

Filesize
88KB

MD5
67dca33ac008f0e2ac4b9d15feaf3a29

SHA1
d641f638dd1cb298b9051993b59fef4d7957cf89

SHA256
ba0d7c863884b26cc510fbc2da2cefb70f5fa9454906873e9bcfab35fab48271

SHA512
860a1c2fdd9bc6e8b1998c7eb9b934ee3b04f435596637aa4c9994623b34fef96cc0a87e5cf7ccc7c1e9c97abf3c3c35cec7f1d937dcd3dfb47f064bb4647909

Download Submit
C:\Users\Admin\AppData\Local\Temp\nlchvqplaqp.f

Filesize
185KB

MD5
ab2fa9b3dcdfd2161b851d99d52723d4

SHA1
934665b0033865165cc46989b66f753c81df54d3

SHA256
81c13b87579bcd37a0875d6eaf4369c9a762fb5a1bc180b498a5457587334b22

SHA512
2a520d53722a9d6135a3cf2b38a73e48e92916b5f5623ddf803df467403a44801922b1d5dd35e4b80edc4507a3eadaafadef82c3455aa5891a99d48ae8f02de4

Download Submit
C:\Users\Admin\AppData\Local\Temp\vikaf.au3

Filesize
6KB

MD5
866534baecedd53196af71713c36b65e

SHA1
d05b9466d481ca8d3be3a190b85af494fccd9406

SHA256
e772631fbcae9b3d339a9556899a5d44194ab2acdb061cb081514e94c92c18e6

SHA512
6947781c62d388da05e02621fa8696547f8bbaae3e1168afbaf1e9114c42c254f1344a3ad746357c6c98e191495291724ba1c09c987d43b83b8514d5c33f5ae6

Download Submit
C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe

Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe

Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
C:\Users\Admin\AppData\Local\Temp\wlljbvbd.exe

Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
memory/512-144-0x0000000002F80000-0x0000000003030000-memory.dmp

Filesize
704KB

Download
memory/512-153-0x0000000008710000-0x0000000008827000-memory.dmp

Filesize
1.1MB

Download
memory/512-151-0x0000000008710000-0x0000000008827000-memory.dmp

Filesize
1.1MB

Download
memory/512-149-0x0000000002F80000-0x0000000003030000-memory.dmp

Filesize
704KB

Download
memory/3352-147-0x00000000009C0000-0x00000000009ED000-memory.dmp

Filesize
180KB

Download
memory/3352-146-0x0000000000820000-0x0000000000839000-memory.dmp

Filesize
100KB

Download
memory/3352-148-0x0000000002BB0000-0x0000000002EFA000-memory.dmp

Filesize
3.3MB

Download
memory/3352-150-0x0000000002A50000-0x0000000002ADF000-memory.dmp

Filesize
572KB

Download
memory/3352-152-0x00000000009C0000-0x00000000009ED000-memory.dmp

Filesize
180KB

Download
memory/4280-143-0x00000000001F0000-0x0000000000200000-memory.dmp

Filesize
64KB

Download
memory/4280-142-0x0000000000180000-0x00000000001AF000-memory.dmp

Filesize
188KB

Download
memory/4280-141-0x0000000000F90000-0x00000000012DA000-memory.dmp

Filesize
3.3MB

Download
memory/4440-136-0x0000000000CC0000-0x0000000000CC3000-memory.dmp

Filesize
12KB

Download